KAMPALA, Uganda — Twenty-five-year-old Fred Wakoli, like roughly 10,000 other men in Uganda's capital city, makes his living driving a motorcycle taxi.Drivers often work at least six days a week and 12 hours a day to take home around $30 a week. Scratching out a living is made tougher by the fact that most drivers never manage to own their own motorcycle, known as a boda b...